1. The year pillars of the man and the woman should not conflict, clash, or be harmed, because the year pillar is the root, the month is the seedling, the day is the flower, and the hour is the fruit. The year pillar is the soul of the eight characters, the foundation, so if they have conflicts or clashes in the year, it is not advisable, as it may lead to accidents or disasters after marriage. 2. The day pillars of the man and the woman should not conflict, clash, or be harmed, because the day pillar is the "flower", representing the marital palace. If the marital palaces of the two conflict or clash, it is not advisable, as it may result in difficulties in maintaining harmony in the marital relationship after marriage. 3. The four pillars' zodiac signs of the man and the woman should not conflict, clash, or be harmed, because the year represents the parents' palace, the month represents the siblings' palace, the day represents the marital palace, and the hour represents the children's palace. If there are mutual conflicts or harms among the four pillars, conflicting with the year is harmful to the parents, conflicting with the month is harmful to relatives, conflicting with the day is harmful to the family, and conflicting with the hour is harmful to the children. 4. A man with all yang should be matched with a woman with all yin, and a man with all yin should be matched with a woman with all yang. Similarly, for women, this balance ensures the coordination of yin and yang. 5. The destiny pillars of the man and the woman should not conflict, clash, or be harmed, because the destiny pillar is the place where one's fate resides. As stated in "Sanming Tonghui": "The deity has no temple to return to, and a person has no house to live in. A destiny has no palace to be governed." The destiny pillar is like a person's home, so its importance is evident. If the destiny pillars of the two conflict or clash, the foundation of the family and the emotional relationship after marriage will be difficult to stabilize, leading to a sense of crisis and lack of security. 6. The auspicious elements (Xiju Shen) of the man and the woman should not conflict, clash, or be harmed, because the Xiju Shen is the medicine for curing an eight-character chart. If the Xiju Shen of the two conflict, it will make it difficult for the couple to be united in thoughts and actions after marriage, leading to conflicts and disagreements, such as one wanting to go east while the other wants to go west, one wanting to go to Beijing while the other wants to go to Tianjin, and thus easily leading to separation. 7. The three palace positions of the man and the woman should be compatible, also known as the "Guashu Hehun" or "Three Palaces Marriage Matching". This method uses the eight directions of the Bagua (Qian, Kun, Kan, Li, Zhen, Gen, Xun, Dui) to represent the palaces of the man and the woman, then matches these palaces. The results of the match include eight types: Fu De (Happiness), Sheng Qi (Vitality), Tian Yi (Healing), Gui Hun (Returning Soul), You Hun (Wandering Soul), Wu Gui (Five Demons), Jue Ti (Dead Body), and Jue Ming (Dead Death). Among these, Fu De, Sheng Qi, and Tian Yi are considered the best, indicating a prosperous lineage. Those matching with You Hun, Gui Hun, and Wu Gui are considered moderate, indicating some worries for the man and the woman. Those matching with Jue Ti and Jue Ming are considered very bad.